Clutch and brake mechanism



S. A. DOBYNE.

CLUTCH AND BRAKE MECHANISM. APPLICATION FILED FEB. 10, 1917.

1,352,585, PatentedSept. 14, 1920.

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S. A. DOBYNE.

CLUTCH AND BRAKE MECHANISM.

APPLICATION FILED FEB. Io, I9I7. n

1, 352,585 Patented Sept. 414:, 1920.

2 SHEETS-SHEET 2.

ITED STATES vPerri-:NT OFFICE.

STEPHEN A. DOBYNE, 0F ST. LOUIS, MISSOURI, .ASSIGNOR T0 CHAMPION SHOE MACHINERY COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MIS- SOURI.

CLUTCH AND BRAKE MECHANISM.

Specification of Letters Patent. i-Patented Sept, 14:, 1920 Application sied February 1c, 1917. serial No. 147,943.

To all wlw-m. it may concern I Be it known that I, STEPHEN A. DOBYNE,

'a citizen of the United States, and residing,

One of the objects of this invention, therefore, is to provide a Clutch and brake mechanism in which the inertia of the shaft is utilized to apply the brake immediately after the clutch has been shifted, so that the inertia of the drive shaft and of the parts connected therewith is absorbed in applying the brake, and thus to bring the drive shaft to a'stop.

Another object is to provide clutch and brake mechanism which yis simple in construction, effective in its operation, and

cheap to manufacture.

Further objects will appear from the detail description taken in connection with` the accompanying drawings.

In the accompanying drawings,

Figure 1 is an end elevation of a clutch embodying'this invention;

f Fig. 2 1s a section on theline 2 2, of Fi 1;

Fig. 3 is a section on the line 3 3, o-f Fig. 2;

Fig. 4 is an enlarged section on the line 4-4, of Fig. 3;

Fig. 5 is a detail perspective view of two of the shifting members of the clutch;

Fi 6 is a detail perspective view of the shiftln fork; and,

Fig. is a detail perspective ofthefshiftf in collar.

eferring to the drawings, 1 designates a column upon which is supported a machine head 2 which carries, in this case, fastener inserting'mechanism of thev character shown and described in my application, Serial Number 830,050, slee April c, 191i.-| Mounted in this machine head is a drivenA shaft 3 to which is keyed, the fixed member or element 4 of the clutch, which has a leather or asbestos cone facing 5 coperating with a corresponding face on the pulley lor element 6, whose hub 7 is loosely mounted on the.v

in Fig. 7, has a collar 17 bearing against Y roller-bearing 13, and a nut 18 threaded on the sleeve clamps this sleeve to the rollerbearing.

against relative endwise movement. Pivoted on a support 19 is `a shifting fork 20 embracing the collar 16 and having rounded lugs 21 bearing against the flange 17 on the collar.` The end 22 of this fork engages the recess 23 in the shank 24 of a clutch shifting element, which shank'slides in a bushing 25a in the fixed member 4 of the clutch. This shank has a head 25 whose inner face is of arcuate form to coperate with the cylindrical face of the hub 26 on the fixed clutch member 4. The shank of the support 19 is threaded into a sleeve 27, in turn being reduced in diameter where it enters the sleeve to form a shoulder. The shank is provided with an angular head and with a lock-nut 28, while the sleeve is provided with a lock-nut 29. In this way, by adjustment of the angular head of the sleevc27, the .fork 20 can be adjusted to take up wear.

Mounted on the machine head 2 is a guide 30 for the slide 31 of a controller, which slide is engaged by the end' 32 of ahlever 33, pivoted on a bracket 34 on the machine head, and connected to a clutch rod 35 passing through a bracket 36 on the column 1.V spring 37 mounted between the bracket 36 and a collar 38 on the clutch rod, normally tends to move this clutch rod down and the slide 31 up. The slide 31 has mounted thereon a hardened block 39 which has a beveled face 40 coperating with a beveled face 41 on the hardened head 25,.

The sleeve 16, roller-bearing 13' and the hub 15 are thus secured togetherl Formed on the fixed clutch member 4 is an annular rib 42 coperating with a pair 0f brake-shoes 43-44, which are linked t0- gether by a link 45. The brakeshoe 44 is pivoted at 46 on the machine head and bears upon an adjustable screw 47, also on the machine head, while a spring 48 is mounted between the fixed end of the shoe 44 and the free end of the shoe 43. Pivoted at 49 on the machine head is the arm 50 of a brake actuator connected by a link 5l to the free end of the brake-shoe 43, this link passing loosely through the brake-shoe and having a sleeve 52, between which sleeve and the brake-shoe, is mounted a spring 53, the tension of which can be adjusted by the nut 54 on the link. The end ofthe arm 50 extends underneath, but normally out of the path of the head 25, and is arcuate partly, as shown at 55, and has a hump` as shown at 56.

Assuming the parts to be in the position shown in Figs. l and 2, with the clutch members 4 and 6 in engagement and the brakeshoes out. of engagement with the rib 42.

Atthis time, the head 25 will be out of the path of the arm 50, so that the pulley 6 can rotate the driven shaft. lf now the clutch treadle, (not shown) is released, the spring 37 will depress the clutch rod 35 and raise the slide 30, so as to throw the block 39 in the path of the head 25. As the beveled faces 40 and 41 move into engagement, they will, by wedging action, cause the shank 24 to move to the left, Fig. 2, thus rocking the fork 20 on its pivot to the left, and moving the clutch pulley 6 out of engagement with the clutch member 4 fixed to the driven shaft 3. At this time, the head 25 is permitted to move laterally, as it is then in a position to clear the face 55 of the arm 50, and move into alinement with the arm. Further rotation of the fixed clutch member with the driven shaft under the inertia of the. driven shaft and the Darts connected thereto, will cause the outer-cylindrical face of the head 25 to engage the hump 56 on the arm 50, and swing this arm downwardly, as shown in Fig. 3, so as to positively move the brake-shoes 43-44, into firm gripping engagement with the rib 42. The parts are so timed that the movement of the brake-shoes into braking engagement with the fixed clutch member 4, will occur immediately after-and in fact practically coincident with the disengagement of the pulley 6 with the fixed clutch member 4, so that the driven shaft 3 will come to a stop with the clutch members disengaged and held disengaged, and with the brake-shoes applied. It will further be seen that the inertia of the driven shaft and of the parts connected thereto, is utilized to apply the brake at the time of the release of the clutch. l't will, of course` be understood that when the clutch treadle is again depressed to drop the slide 31', the

The fixed clutch member 4 has bolted thereto, a sprocket 60 over which passes a sprocket chain 61, driving a counter-shaft below, and not shown. In order to clear this chain the block 39 is cut away, as shown at 62. The adjustable stop 47 permits the brakeshoes to be accurately adjusted to the coperating braking surface.

It will, therefore, be seen that a clutch mechanism is provided which is simple in construction and effective in its operation. ll'hile the brake mechanism acts to quickly stop the machine, this braking action is applied by utilizing the inertia. of the parts connected to the driven shaft, so that the energy due to this inertia is absorbed, and as it gradually is dissipated, operates to gradually, but firmly and through a very short angle, bring the mechanism to a stop.

It is obvious that various changes may be made in the details of construction without departing from the spiritjof this invention. It is, therefore, to be understood that this invention is not to be limited' to the specific construction shown and described.

Having thus described the invention` what is claimed is:

l. In a machine of the class described, a driven shaft including a clutch element, a clutch for said shaft, means for shifting said clutch including a clutch shifting element, a bra-ke for said shaft, means for actuating said brake, operative connections be tween said brake-actuating means and said shaft adapted to utilize the inertia of said shaft to apply said brake, and controlling means operable on said clutch shifting element adapted to cause said element to en gage said brake-actuating means.

2. ln a machine of the class described, a driven shaft, a clutch for said shaft includ inga clutch element, a brake for said shaft, means for shifting said clutch including a clutch shifting element, means for actuat in said brake, and means for controlling said shifting element adapted to disengage said clutch clement and adapted to cause said shifting element to coperate with said actuating means to apply said brake.

3. In a machine of the class described, a driven shaft, a clutch for said shaft including a `clutch element, a brake for said shaft. means for shifting said clutch including a clutch shifting element, means for actuating said brake, and means for controlling said shifting element adapted to disengage said clutch element and adapted to cause said shifting element' to coperate with said actuating means and operate under the inertiaof said shaft to apply said brake.

4. In a machine of the class described, a driven shaft, a clutch for said shaft inc1uding a -clutch element, a brake for said shaft, means including a clutch shifting element, rotatable with said shaft. adapted to shift said clutch, means for actuating said brake, and means` 'for controlling saidV shifting means adapted to cause said shifting elementl to move into engagement with said actuating means and operate by inertia to apply said brake.

5. In a machine of the class described, a driven shaft, a clutch for said sha-ft,.a brake for said shaft, a clutch shifter rotating with said shaft, an actuator for said brake, and a controller adpated to engage said shifter to disengage said clutch and adapted to position said shifter to engage said actuator to apply said brake.

6. In a machine of the class described, a driven shaft, a clutch for said shaft, a brake for said shaft, an actuator for said brake, a clutch shifter .rotating with said shaft and movable into and out of coperative relation With said actuator, and a controller adapted to engage said shifter to disengage said clutch and adapted to position said shifter to engage said actuator to apf. ply said brake.

7. In a machine of the class described, a driven shaft, a clutch :for said shaft,a brake for said'shaft, an actuator for said brake, a clutch shifter rotating with said shaft and movable `into and out of coperative rela.

tion with said actuator, and a controller movable into the path of said shifter adapted to move sald shifter to disengage said clutch and engage said actuator'to apply said brake. i

8. In a machine of the class described, a Y

for said shaft, an actuator for said brake, a

-clutch shifter rotating with said shaft and movable axially into and out of coopera-t tive relation wltli said actuator. and a con cause said shifter to aline with and engage said actuator to apply said clutch. t

l0. In a machine of the class described, a driven shaft` a clutch for said shaft, a bra-ke for said shaft, an actuator for said brake, a clutch shifter rotating with said shaft and movable into and out of coperative relation with said actuator, a controller movable into the path of said shifter adapted to -move said shifter to disengage said clutch and engage said actuator toapply said brake, and mea-ns for adjusting said shifter.

- 11. In av machine of the class described, a driven shaft, a clutch for said shaft, a brake for said shaft, an actuator for said brake, a clutch shifter rotating with said shaft and movable axially into and out of coperative relation with said actuator, a guide for said shifter, and a controller movable into the path of said shifter adapted to dsengage said clutch and to cause said shifter to aline with and engage said actuator to apply said clutch.

In testimony whereof I aiix my signature this 10th day of October, 1916.

STEPHEN A. DOBYN E. 

